(16589) Hastrup Inner Main-belt Asteroid
Discovered on 24 September 1992 by E. F. Helin at Palomar.
Involved with the Surveyor and Viking programs, Rolf Hastrup (b. 1930) continues his long career at Caltech's Jet Propulsion Laboratory, planning future unmanned space missions. He is a classmate of the discoverer's husband (Caltech class of 1953) and long time friend.Naming citation (20030614/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Hastrup is today
Seen from above the solar system on 2026-10-14: Hastrup is 2.03 au from the Sun and 2.74 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 16589 |
| Provisional designation | 1992 SL1 |
| Orbit class | Inner Main-belt Asteroid |
| Diameter | 2.20 km (#16,781 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.580 |
| Rotation period | 128 hours |
| Absolute magnitude (H) | 14.67 |
| Orbital period | 2.69 years |
| Semi-major axis | 1.93 au |
| Perihelion – aphelion | 1.78 – 2.09 au |
| Eccentricity | 0.0784 |
| Inclination | 20.0° |
| Closest distance between its orbit and Earth's (MOID) | 0.786 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 24 September 1992
- (8690) Swindle
- (11916) Wiesloch
- (13092) Schrodinger
- (15761) Schumi
- (20035) Lauriroche
- (21118) Hezimmermann
- (22348) Schmeidler
- (24749) Grebel
- (24750) Ohm
- (29250) Helmutmoritz
- (30883) de Broglie
- (32855) Zollitsch